Audit of coding in gastrointestinal endoscopy.

: The accuracy of the coding of gastrointestinal endoscopic procedures at Llandough Hospital was audited over 12 months. Although the endoscopy unit kept its own records, none of the staff were initially aware of the coding system used for endoscopic procedures for subsequent hospital activity analysis. Conventional typed discharge summaries were usually inadequate for coding purposes, and there was considerable variation in the proportion of procedures coded. Changes made to improve the accuracy and completeness of coding for endoscopic procedures were seen to be effective in a follow-up study.